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WO2003033223A1 - Manches pour produits de soins personnels - Google Patents

Manches pour produits de soins personnels Download PDF

Info

Publication number
WO2003033223A1
WO2003033223A1 PCT/US2002/033008 US0233008W WO03033223A1 WO 2003033223 A1 WO2003033223 A1 WO 2003033223A1 US 0233008 W US0233008 W US 0233008W WO 03033223 A1 WO03033223 A1 WO 03033223A1
Authority
WO
WIPO (PCT)
Prior art keywords
sheath
handle
core
personal care
approximately
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/US2002/033008
Other languages
English (en)
Inventor
William R. Brown
Daniel C. Portman
Helge Zimmett
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Gillette Co LLC
Original Assignee
Gillette Co LLC
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Gillette Co LLC filed Critical Gillette Co LLC
Publication of WO2003033223A1 publication Critical patent/WO2003033223A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26B—HAND-HELD CUTTING TOOLS NOT OTHERWISE PROVIDED FOR
    • B26B21/00—Razors of the open or knife type; Safety razors or other shaving implements of the planing type; Hair-trimming devices involving a razor-blade; Equipment therefor
    • B26B21/40—Details or accessories
    • B26B21/52—Handles, e.g. tiltable, flexible
    • B26B21/528—Manufacture of razor handles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26B—HAND-HELD CUTTING TOOLS NOT OTHERWISE PROVIDED FOR
    • B26B21/00—Razors of the open or knife type; Safety razors or other shaving implements of the planing type; Hair-trimming devices involving a razor-blade; Equipment therefor
    • B26B21/40—Details or accessories
    • B26B21/52—Handles, e.g. tiltable, flexible

Definitions

  • This invention relates to handles for personal care products.
  • Razor handles are typically a certain weight to give a desired feel to a user, both for comfort and a perception of quality.
  • the handle is made of metal to accomplish the weight and feel.
  • razor handles generally should have certain tactile properties, such as comfort and slip resistance, which maybe provided by, e.g., an elastomeric grip.
  • Many razor handles today are generally made from polymers, particularly disposable razors.
  • polymers alone are relatively light when compared to the traditional metal handles.
  • a filler material is mixed with the polymer to make the polymer denser.
  • the filler would be a metal, such as copper, iron or tungsten.
  • adding metal fillers tends to make the handle brittle, thereby reducing impact resistance.
  • the higher the percentage of filler the more brittle the handle becomes.
  • metallic fillers are generally dark and, therefore, a metal filled polymer compound is difficult or impossible to color.
  • a polymer with a metal filler may not have the desired tactile properties.
  • the invention features handles for personal care products that include a core of a polymer containing filler and a sheath of a thermoplastic polymer or an elastomeric material.
  • the core gives the handle its desired weight and rigidity.
  • the sheath provides impact resistance and the desired tactile properties, such as slip resistance and softness.
  • the impact resistance imparted by the sheath also allows for a higher percentage of filler to be added to the core to get the desired weight.
  • the sheath allows the handle to be almost any color.
  • the sheath/core combination allows the core to be made from a less expensive polymer, since the sheath provides the mechanical properties.
  • the filler can be relatively inexpensive since the percentage of filler can be increased and thus lower density fillers can be used to obtain the same weight.
  • the invention features a personal care product handle that includes a core and a sheath surrounding the core, where the core has a density greater than the sheath.
  • the core is a polymer combined with a filler.
  • the filler is a metallic material.
  • the metallic filler can be copper, iron, zinc, aluminum or tungsten.
  • the polymer of the core can be polypropylene, nylon, acrylonitrile butadiene styrene, polybutylene terephthalate, polyurethane, polyphenylenesulfide, polyetheretherketone, polystyrene, polyethylene, or polyphenylene oxide.
  • the sheath is either an elastomeric material or a thermoplastic polymer.
  • the elastomeric material of the sheath can be thermoplastic vulcanates (rubber polyolefin blends), polyetheramides, polyesters, styrene-ethylene-butylene-styrene (SEBS) block copolymers, styrene- butadiene-styrene block copolymers (SBS), partially or fully hydrogenated styrene- butadiene-styrene block copolymers, styrene-isoprene-styrene block copolymers, polyurethanes, polyolefm elastomers, polyolefin plastomers, styrenic based polyolefm elastomers, and compatible mixtures thereof, closed cell foams, resilient urethanes and silicones.
  • thermoplastic vulcanates rubber polyolefin blends
  • SEBS styrene-ethylene-butylene-styrene
  • SBS
  • the thermoplastic polymer of the sheath can be polypropylene, nylon, acrylonitrile butadiene styrene, polybutylene terephthalate, polyurethane, polyphenylenesulfide, polyetheretherketone, polystyrene, high impact polystyrene, or polyphenylene oxide.
  • the sheath hardness is preferably 25 Shore A to 130 Rockwell R, more preferably 50 Shore A to 100 Rockwell R, and most preferably 60 Shore A to 90 Rockwell R.
  • the sheath is preferably 0.5 mm to 3.0 mm thick, more preferably 0.7 mm to 2.0 mm thick and most preferably 0.7 mm to 1.0 mm thick.
  • the personal care product handle is a razor handle, h another aspect of the invention, the personal care product handle is a toothbrush handle.
  • the core is approximately 10 to 80% filler by volume, more preferably 40 to 60% filler by volume.
  • the core has a density of approximately 2.0 to 11.0 g/cm 3 , more preferably 6.0 to 11.0 g/cm 3 .
  • the sheath has a density of approximately 0.8 to 2.0 g/cm 3 , more preferably 1.0 to 1.5 g/cm 3 .
  • the sheath is approximately 30 to 80% of the volume of the handle, more preferably 45 to 60% and most preferably 45 to 50%.
  • the sheath is slip resistant.
  • the sheath is impact resistant.
  • a further aspect of the invention includes a razor handle having a polymeric core surrounded by an elastomeric sheath, wherein the polymeric core has a density greater than the elastomeric sheath.
  • the core can further include a filler.
  • the filler can be a metallic filler.
  • the razor handle can include a portion of the polymeric core exposed through the sheath. The exposed portion of the polymeric core defines a connection point for a razor cartridge.
  • Another aspect of the invention features methods of making the above described products.
  • One method includes forming a core and forming a sheath around the core.
  • the core has a density greater than the sheath, and the core and sheath are formed by a sandwich-molding process.
  • FIG. 1 is a perspective view of a razor according to one embodiment of the invention.
  • FIG. 2 is a cross-sectional view of the razor of FIG. 1.
  • FIG. 3 is a cross-sectional view of the razor of FIG. 2 taken along line
  • FIG. 4 is a cross-sectional view of a mold used to make the razor of FIG. 1.
  • FIG. 5 is a cross-sectional view of the mold of FIG. 4 with a shot of sheath material entering the cavity.
  • FIG. 6 is a cross-sectional view of the mold of FIG. 5 with a shot of core material entering the cavity.
  • FIG. 7 is a cross-sectional view of the mold of FIG. 6 with a final shot of sheath material entering the cavity.
  • FIG. 8 is a cross-sectional view of a razor according to an alternate embodiment of the invention.
  • FIG. 9 is a cross-sectional view of a razor according to another alternate embodiment of the invention.
  • a razor 10 includes a handle 12 and a head portion 14.
  • a razor blade cartridge 16 is mounted to the head portion 14.
  • the handle 12 has a grip 18 that provides comfort for the user and a non-slip surface to prevent the handle 12 from slipping from the user's hand.
  • the handle 12 includes a core 20 enclosed in a sheath 22.
  • the core is generally formed of a polymer loaded with filler 24.
  • the sheath is generally formed of an unfilled polymer.
  • the grip 18 can either be contours molded into the sheath 22 or soft grips of thermoplastic elastomers molded onto the handle 12.
  • the core 20 and sheath 22 will be formed such that the sheath 22 is a thin layer around the core 20.
  • the sheath 22 at its thinnest point, Ts is preferably 0.5 to 3.0 mm thick, more preferably 0.7 to 2.0 mm, and most preferably 0.7 to 1.0 mm.
  • the thickness of the core will depend on the design and size of the razor 10.
  • the GoodNewsTM disposable razor (depicted in the figures) will have a core at its thickest point, Tc, of approximately 0.5 to 2.5 mm, more preferably 0.6 to 2.0 mm, and most preferably 0.6 to 1.5 mm.
  • the thickness or diameter of the overall razor, Tr is generally 8 to 10 mm.
  • the core 20 is generally a polymer filled with a metallic filler.
  • core polymers include, but are not limited to, polypropylene, nylon, acrylonitrile butadiene styrene, polybutylene terephthalate, polyurethane, polyphenylenesulfide, polyetheretherketone, polystyrene, polyethylene, and polyphenylene oxide.
  • the present invention allows for the utilization of an inexpensive polymer that can be sandwich molded with a chosen sheath material, as described below.
  • the filler is chosen to increase the density of the core polymer.
  • Suitable fillers include, but are not limited to, copper, iron, zinc, aluminum and tungsten.
  • Preferred sheath materials will have good impact resistant qualities because the sheath will provide the impact resistance for the core 20, which may be brittle due to the filler.
  • the sheath can also be chosen to provide slip resistance.
  • Suitable sheath materials include thermoplastic elastomers, such as SBS copolymers, thermoplastic vulcanates (rubber polyolefin blends), polyetheramides, polyesters, styrene-ethylene-butylene-styrene (SEBS) block copolymers, styrene-butadiene- styrene block copolymers, partially or fully hydrogenated styrene-butadiene-styrene block copolymers, styrene-isoprene-styrene block copolymers, polyurethanes, polyolefin elastomers, polyolefin plastomers, styrenic based polyolefin elastomers,
  • sheath materials include thermoplastic polymers such as polypropylene, nylon, acrylonitrile butadiene styrene, polybutylene terephthalate, polyurethane, polyphenylenesulfide, polyetheretherketone, polystyrene, high impact polystyrene, and polyphenylene oxide.
  • the sheath will generally have a hardness of approximately 25 Shore A to 130 Rockwell R, more preferably 50 Shore A to 100 Rockwell R, and most preferably 60 Shore A to 90 Rockwell R.
  • the percent volume of sheath material in relation to the total core and sheath material, is approximately 30 to 80%, more preferably 45 to 60%), and most preferably 45 to 50%>.
  • the percent volume may vary depending on the particular materials chosen.
  • the handle may be formed by a sandwich- molding process.
  • the mold 30, shown in FIG. A has a cavity 32 shaped like the finished razor handle 10.
  • a gate 34 leads into the cavity 32, allowing the sheath and core materials to be injected into the mold cavity 32.
  • a shot of sheath material 36 is injected into the cavity 32 via the gate 34 to start forming the sheath 22 of the razor handle 10, as shown in FIG. 5.
  • the amount injected is calculated to provide a sheath with the desired thickness when the core material is injected into it.
  • a minimum thickness is necessary to prevent the core material from breaking through the sheath.
  • a mimmum of 40% by volume of sheath material 36 is generally suitable to prevent break-through when using a nylon-6 polymer, commercially available from RTP under the trade name RTP 299 AX 857673 B, as the core material.
  • RTP 299 AX 857673 B commercially available from RTP under the trade name
  • the two polymers preferably have similar melt temperatures. If the process melt temperatures of the two polymers are very different, the polymer with the lower melt temperature might not be able to stand the higher processing temperature necessary to process the other polymer without degradation.
  • the melt viscosities of the two polymers at process temperature can be similar or different.
  • the viscosity of the sheath polymer at process temperature generally should not be less than 45% of the viscosity of the core polymer at process temperature.
  • the sheath polymer can be chosen with a viscosity less than 45% below that of the core polymer to produce the swirl marks.
  • the sheath polymer is chosen to adhere to the core polymer, providing better part integrity.
  • the sheath polymer should be chosen to allow the elastomeric grips to adhere to the sheath 22.
  • a shot of core material 38 is then injected into the center of the sheath material 36 through the same gate 34, thereby filling and expanding the sheath material 36 to the shape of the mold (FIG. 6).
  • the amount of core material 38 injected will depend on the final thickness of the handle 12. A sufficient amount will be injected to expand the sheath material and almost fill the mold cavity 32 defining the handle 12, leaving room for a final shot of sheath material. However, care should be taken not to inject an amount of core material 38 that would completely fill the mold cavity and possibly break through the sheath 22, unless this is desirable, as described below with reference to Fig. 8.
  • a foaming agent may also be added to the core to reduce sink marks in the sheath.
  • the foaming agent will cause the core to expand further than it would without the foaming agent and, therefore, push the sheath material outward against the mold. This will prevent the sheath from having sink marks or depressions on the surface of the handle by compensating for the volumetric shrinkage of the core polymer melt as it cools, assuring that the sheath has a surface finish with little or no defects.
  • the foaming agent causes bubbles in the core polymer, but the sheath hides the bubbles that occur.
  • the amount of sheath material may be calculated to allow the core material to break through. As shown in FIG. 8, the core 20 is allowed to break through the sheath 22 to form the head 14 of the razor 50 where a razor blade cartridge would be attached. On a toothbrush, the core can be allowed to break through to form the head where the bristles attach.
  • the head 14 may be a separate head portion 62. This allows for a third material to be used for the head 14, allowing for different mechanical properties or colors on the head portion.
  • the handle 12 can be molded around the head portion 62, allowing the core 20 and sheath 22 to bond to the head portion 62.
  • the head portion 62 is molded in a separate molding operation, and then placed in a mold to allow the handle 12 to be sandwich molded around the head portion 62.
  • the sheath may include a small amount of filler.
  • the sheath may include fillers other than the metal fillers described here, such as fillers added for aesthetic or manufacturing purposes.
  • An example of a GoodNewsTM razor handle made according to the invention included a sheath of high impact polystyrene, which has a density of approximately 1.05 g/cm 3 .
  • the core was a nylon-6 filled with tungsten, which is manufactured by RTP under the trade name RTP 299 AX 857673 B.
  • the density of the nylon-6 polymer is approximately 1.1 g/cm 3 .
  • the core polymer was filled with tungsten to deliver a compound with a density of approximately 4.9 g/cm 3 .
  • the resulting razor handle had a weight of approximately 13g.
  • the same part made of polypropylene alone which has a density of 0.9 g/cm 3 , had a weight of only 6g.
  • the sheath was about 1.0 mm thick on a handle that is 9.0 x 9.0 mm square, and the core was not allowed to break through the sheath.
  • Another example of a GoodNewsTM razor handle made according to the invention included a sheath of thermoplastic elastomer compound available from

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Compositions Of Macromolecular Compounds (AREA)

Abstract

L'invention concerne des manches conçus pour des produits de soins personnels et présentant une structure enveloppe/coeur. L'invention se rapporte en outre à des procédés de production de tels manches.
PCT/US2002/033008 2001-10-15 2002-10-15 Manches pour produits de soins personnels Ceased WO2003033223A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US09/977,431 US20030070309A1 (en) 2001-10-15 2001-10-15 Handles for personal care products
US09/977,431 2001-10-15

Publications (1)

Publication Number Publication Date
WO2003033223A1 true WO2003033223A1 (fr) 2003-04-24

Family

ID=25525119

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2002/033008 Ceased WO2003033223A1 (fr) 2001-10-15 2002-10-15 Manches pour produits de soins personnels

Country Status (2)

Country Link
US (1) US20030070309A1 (fr)
WO (1) WO2003033223A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7874076B2 (en) 2005-02-03 2011-01-25 Bic Violex Sa Razor handle having ergonomic ribbed sides
US7934320B2 (en) 2005-02-03 2011-05-03 Bic-Violex Sa Razor handle having an arcuate profile
CN103214781A (zh) * 2013-04-26 2013-07-24 中塑联新材料科技湖北有限公司 丙烯腈-丁二烯-苯乙烯共聚物专用密度调节剂

Families Citing this family (31)

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Publication number Priority date Publication date Assignee Title
US20050031865A1 (en) * 2002-07-23 2005-02-10 Sauer Bryan B. Fibers, tapes and films prepared from olefinic and segmented elastomers
CA2596784A1 (fr) * 2005-02-03 2006-08-10 Bic-Violex Sa Manche de rasoir comportant une zone appui-doigt sur coussin d'air
BRPI0519883A2 (pt) * 2005-02-03 2009-09-15 Bic Violex Sa cabo de aparelho para barbear
CN100546778C (zh) * 2005-02-03 2009-10-07 比克-维奥利克斯公司 具有会合的侧表面的剃刀手柄
US7975389B2 (en) * 2005-02-03 2011-07-12 Bic-Violex Sa Razor handle having ergonomic gripping areas
FR2884389B1 (fr) * 2005-04-15 2007-08-10 Jean Christian Horel Scarificateur de patons adapte pour diminuer la penibilite de la scarification
FR2900889B1 (fr) * 2006-05-09 2009-03-20 Faurecia Interieur Ind Snc Garnissage souple pour piece d'equipement de vehicule automobile et piece d'equipement associee
US7779543B2 (en) * 2006-09-28 2010-08-24 Eveready Battery Company, Inc. Razor with moveable center of balance
EP2554353B1 (fr) * 2011-08-05 2017-06-07 Trisa Holding AG Procédé de fabrication d'une brosse à dents et brosse à dents
US9980557B2 (en) 2012-05-17 2018-05-29 Colgate-Palmolive Company Oral care implement and method of forming an oral care implement
US20140238433A1 (en) * 2013-02-28 2014-08-28 Russell Jackson Depilatory cream removing device
PL3110599T3 (pl) * 2014-02-28 2020-03-31 Bic-Violex S.A. Uchwyt maszynki do golenia zawierający wkładki w otworach oraz maszynka do golenia zawierająca taki uchwyt maszynki do golenia
US20170173809A1 (en) * 2014-08-04 2017-06-22 Bic-Violex Sa A razor handle comprising an insert within a hole and razor comprising such a razor handle
US11104020B2 (en) 2016-03-04 2021-08-31 Harry's, Inc. Razor handle and method of manufacture
USD874061S1 (en) 2018-03-30 2020-01-28 The Gillette Company Llc Shaving razor cartridge
JP2021515672A (ja) 2018-03-30 2021-06-24 ザ ジレット カンパニー リミテッド ライアビリティ カンパニーＴｈｅ Ｇｉｌｌｅｔｔｅ Ｃｏｍｐａｎｙ Ｌｌｃ 剃毛用かみそりシステム
EP3774227A1 (fr) 2018-03-30 2021-02-17 The Gillette Company LLC Manche de rasoir avec éléments mobiles
CN111819050B (zh) 2018-03-30 2022-10-04 吉列有限责任公司 具有可移动构件的剃刀柄部
CN111819048A (zh) 2018-03-30 2020-10-23 吉列有限责任公司 具有枢转部分的剃刀柄部
EP3774233B1 (fr) 2018-03-30 2024-08-07 The Gillette Company LLC Manche de rasoir avec une portion pivotante
WO2019191185A1 (fr) 2018-03-30 2019-10-03 The Gillette Company Llc Manche de rasoir avec éléments mobiles
JP2021517492A (ja) 2018-03-30 2021-07-26 ザ ジレット カンパニー リミテッド ライアビリティ カンパニーＴｈｅ Ｇｉｌｌｅｔｔｅ Ｃｏｍｐａｎｙ Ｌｌｃ 枢動部分を有するかみそりハンドル
US11607820B2 (en) 2018-03-30 2023-03-21 The Gillette Company Llc Razor handle with movable members
CN111819044B (zh) 2018-03-30 2022-09-16 吉列有限责任公司 具有枢转部分的剃刀柄部
US20190299452A1 (en) 2018-03-30 2019-10-03 The Gillette Company Llc Shaving razor cartridge
US11123888B2 (en) 2018-03-30 2021-09-21 The Gillette Company Llc Razor handle with a pivoting portion
BR112020020123A2 (pt) 2018-03-30 2021-01-26 The Gillette Company Llc empunhadura de aparelho de barbear ou depilar com uma porção pivotante
US11691307B2 (en) 2018-03-30 2023-07-04 The Gillette Company Llc Razor handle with a pivoting portion
EP3756838A1 (fr) * 2019-06-26 2020-12-30 Bic Violex S.A. Manche de rasoir avec contenu recyclé
US20220088810A1 (en) * 2020-09-21 2022-03-24 Beauty Perspectives, LLC Razor handle
EP4112254B1 (fr) * 2021-06-30 2025-02-26 BIC Violex Single Member S.A. Manche de rasoir fabriqué à partir de pneus de voiture recyclés

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US5403534A (en) * 1991-09-26 1995-04-04 Tritec International Corporation Disposable razor
US5433910A (en) * 1991-05-14 1995-07-18 Toyoda Gosei Co., Ltd. Method of producing molding
US5440808A (en) * 1992-01-30 1995-08-15 Warner-Lambert Company Disposable shaped article
US5786416A (en) * 1993-09-06 1998-07-28 John C. Gardner High specific gravity material
DE19832456A1 (de) * 1998-07-18 2000-01-20 Bayer Ag Biologisch abbaubare Formmassen mit hoher spezifischer Dichte
US20010016524A1 (en) * 1997-07-14 2001-08-23 Sullivan Michael J. Golf ball containing high density fillers in the core and cover

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Publication number Priority date Publication date Assignee Title
US5107590A (en) * 1991-03-26 1992-04-28 Warner-Lambert Company Razor handle
US5433910A (en) * 1991-05-14 1995-07-18 Toyoda Gosei Co., Ltd. Method of producing molding
US5403534A (en) * 1991-09-26 1995-04-04 Tritec International Corporation Disposable razor
US5440808A (en) * 1992-01-30 1995-08-15 Warner-Lambert Company Disposable shaped article
US5786416A (en) * 1993-09-06 1998-07-28 John C. Gardner High specific gravity material
US20010016524A1 (en) * 1997-07-14 2001-08-23 Sullivan Michael J. Golf ball containing high density fillers in the core and cover
DE19832456A1 (de) * 1998-07-18 2000-01-20 Bayer Ag Biologisch abbaubare Formmassen mit hoher spezifischer Dichte

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7874076B2 (en) 2005-02-03 2011-01-25 Bic Violex Sa Razor handle having ergonomic ribbed sides
US7934320B2 (en) 2005-02-03 2011-05-03 Bic-Violex Sa Razor handle having an arcuate profile
CN103214781A (zh) * 2013-04-26 2013-07-24 中塑联新材料科技湖北有限公司 丙烯腈-丁二烯-苯乙烯共聚物专用密度调节剂

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